Bolt-cutter



2- She'ets-.-Sheet 1.

(No Model) W. L. BUTCHER; BOLT CUTTER.

No. 517,848. Patented Apr. 10, 1894.

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(No Model.) 2 SheetsSheet 2.

w. L.'DUTOHE R. BOLT CUTTER.

No. 517,848. Patented Apr. 10, 1894.

ms NATIONAL LITNOGHAFHINQ ceMPAlh.

WASHINGTON. a. c.

To all whom it concern:

hole 7 and the ear 4 with a slot 8 for receiving UNITE STATES I WILLIAMDUTOHER,

PATENT OFFICE.

OF ROME, ASSIGNOR TO P. D. RANDALL & SON,

OF TROY, NEW YORK.

BOLT-CUTTER.

SPECIFICATION forming part of Letters Patent N 0. 517,848, dated April'10, 1894.

Application filed August 3,1893.

Be it known that 1, WILLIAM L. DU'roHER, of Rome, in the county ofOneida and State of New York, have invented certain new and usefulImprovements in Bolt-Cutters; and I do herebydeclare that the followingis a full, clear, and exact description of the invention, which willenable others skilled in the art to which it appertains to make and usethe same, reference being had to the accompanying drawings, and to thefigures of reference marked thereon, which form part of thisspecification.

My present invention relates to an improvement in bolt cutters.

In the drawings, Figure 1 shows the bolt cutter in closed position. Fig.2 shows an edge and plan view of one part of the joint between thehandle levers. Fig. 3 shows in like manner the other part. Fig. 4 showsa section of the device takenon a line coincid ing with A-B of Fig. 3and shows parts adjacent to the section. Fig. 5 shows in a similarmanner a section on line -D of Fig. 3. Fig. 6 shows the cutter in openposition. Fig. i 7 shows in detail a spring barrel and plunger. Fig. 8shows an upper end view of the part shown in Fig. 7. Fig. 9 shows alongitudinal section of the parts shown in Fig. 7 showing the parts andspring in the position which theyassume when the cutters are closed.Fig. 1 10 shows the same as Fig. 9 with the parts and spring in theposition which they assume when the cutters are in open position. Fig.11 shows a bottom view of the cutters or -cutting levers. Fig. 12 showsthe bottom or inner face view of the part shown in Fig. 8. Fig. 13 showsa section on line EF of Fig. 1.

The lever handles 1 and 2 are provided with circular ears 3 and 4respectively which form the hinge joint between the two lever handles.The circular ear 3 is provided with projections adapted to enter aseries of grooves as6 on the ear 4. The ear 3 is provided with a boltthe bolt 9, which forms the hinging pivot and which holds the two leverhandles together. The object of the grooves 6 and the projections 5together with the slotted opening 8 is to provide a ready means ofadjustment in the joint to compensate for the wear of the cutting seenNo. 482,223. (No model.)

edges. The projections 5 are moved over from one groove into the nextadjacent groove, while the bolt 9 is moved along the slot 8. To theshort arms of the lever handles land 2 are pivoted at and 11 the cuttinglevers 12 and 13. The cutting levers are provided with cutting edges 14and are pivoted on pivots 15 and 16 in a pair of straps 17 and 18 placedupon either side of the cutting levers. The cutting levers are providedin each of their sides adjacent to the contiguous edges withslot-like'indentations as aadapted to receive circular or semi-sphericalprojections as b'provided on the inner faces of the straps 17 and 18.The object of the slotted indentations a and projections b are to limitthelateral movement of the cutting levers with reference to. each other.It is evident that in lieu of the indentations a. and projections b aslotted opening entirely throughor in the edge of the body of each ofthecutting levers may be provided and a pin secured in the strapspassing through each slot, or the slots and projections may beinterchanged with the slots in the straps and the projections on thecutting levers. On the strap 17 I provide a spring barrel 19 providedwith a screw-threaded plug 20in one end and adapted to receive the adjustable plunger head 21 in the other end and confining the spring 22.The plunger head 21 is adjustable by rotating on the screwth'readed'stem23 of the plunger. The stem 23 is formed integral with the washer 24which engages with the hinge joint between the lever handles andprotects the same and is secured at the joint on the hinge bolt 9. Thearrangement of the spring barrel, spring and plunger, is such that whenthe bolt cutter is closed and the jaws come together the spring will becompressed so that the several convolutions will engage each other andthus the compression of the spring will be limited and the handles willbe cushioned as the cutting edges of the cutting levers sever the piecebeing cut and the blow or jar to the handles which takes place at thetime that the cutting is accomplished will be relieved and cushioned bythe action of the spring and the several convolutions coming in contactas before described.

It will be sufficient to note that the spring 22 besides cushioning theblow also operates in a measure to open the lever handles and cuttingjaws, and that the device can be more nicely adjusted by means of thescrew-plug 2'0 and the adjustable plunger 21, so as to bring the partsto rest exactly at the time that the cutting jaws come together. Anygreat amount of wear on the cutting jaws is compensated for in the jointbetween the lever handles by means of the projections and grooves,before described, provided in the joint. The arrangement of theprojections?) and slotted indentations a with the spring barrel 19 fixedon the strap 17 and the plunger operating from the hinged joint betweenthe handles is such that the cutting lovers are held alwayssubstantially on the axial line of the device whether inv open or closedor intermediate position. It should be noted that the length of theslot-ted indentations a are such that the swinging movement of the jawis permitted without any or hardly any excess in length of the slot.

It is evident that numerous other changes and modifications in and fromthe construction described, other than those herein noted, may be madewithout departing from the equivalents of my invention.

What I claim as new, and desire to secure by Letters Patent, is

1. In a bolt cutter, a pair of lever handles hinged together, a pair ofcutting levers hinged in a strap, the ends of the cutting levers beingpivoted to the ends of the lever handles, a spring and guide barrelfixed on the strap holding the cutting levers and projecting toward thehinging joint between the lever handles, and a plunger connecting withthe joint between the lever handles and extending into the barrel, allcombined, substantially as set forth.

2. The combination of a pair of lever handles hinged together,a pair ofcutting levers hinged in straps, each mounted on an independent pivot inthe strap,afixed projection on the strap and a slotted opening in thecutting leverssubstantially in line between the pivotal pointof thecutting levers, substantially as set forth.. 4

3. The combination of a pair of cutting levers hinged on independentpivots in straps, a projection from the straps into slotted indentationsin the cutting levers, and a pair of lever handles hinged together andconnecting with the cutting levers, substantially as set forth. 1

4. The combination of a pair of lever handles, an adjustable hingedjoint between the lever handles having projections arranged at the sidesof the pivotal center of the joint on one of the parts and a series ofgrooves substantially concentric with the pivotal center of the joint inthe other part adapted to receive the projections as one part isadjusted sidewise upon the other part, a slotted opening in one of theparts for permitting the adjustment, a bolt or pivotal pin extendingthrough the pivotal center of the hinged joint and holding the sametogether, and a pair of cutting jaws hinged to the short arms of thelever handles, substantially as set forth.

5. The combination of a pair of lever handles, an adjustable hingedjoint between the lever handles having a projection on one of the partsof the joint, and a series of substantially concentric grooves on theother part adapted to receive the projection as the parts are adjustedsidewise upon each other, an opening in each of the parts for thereception of a pivotal pin orbolt, and a bolt or pivotal pin,substantially as set forth.

6. In a bolt cutter, a pair of lever handles hinged together, a pair ofcutting levers each connected with the short arm of the lever handlesand pivoted on independent pivots in a strap, a connection between thestrap and the hinge joint between the lever handles,

and -a cushioning spring introduced in the connection, combinedsubstantially as set forth.

7. In a bolt cutter, a pair of lever handles hinged together, a pair ofindependent cutting levers hinged to the short arms of the leverhandles, a strap engaging the cutting levers, a pivot for each cuttinglever in the strap, an independently operating means for limiting theswinging movement of each of the levers on its pivot, combinedsubstantially as set forth.

8. In a bolt cutter, a pair of lever handles hinged together,a pair ofcuttinglevers hinged in a strap, the ends of the cutting levers beingpivoted to the ends of the lever handles, a spring and guide barrelfixed to the strap and. extending-toward the hinged joint of the leverhandles, a plunger connected'with the hinged joint and extending intothe barrel, a spring in the barrel, and means for adjusting the lengthof the barrel, combined substantially as set forth.

9. In a bolt cutter, a pair of lever handles hinged together, a pair ofconnecting levers hinged on independent pivots in a strap, the ends ofthe cutting levers being connected to the ends of the lever handles, aspring and guide barrel fixed on the strap, and extending toward thejoint between the lever handles,

IOO

a spring in the barrel, a plunger working in the barrel and connectedwith the hinged joint between the lever handles, and means foradjustingthe length of the plunger, all combined substantially as setforth.

In witness whereof I have affixed my signature in presence of twowitnesses. 1 WILLIAM L. DUTGHER. Witnesses:

IRA TEETER, GEORGE C. CARTER.

